美国有几十家机构在做选民调查，难免出现差异，加上民调对象不同，例如已登记选民（registered voters）和拟投票选民（likely voters）就有差别。已登记选民会接受访问却未必真会去投票。
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3月份进行的民意测验中，47%的已登记选民说，会继续给奥巴马投票，仅有37%的选民说，他们会将票投给尚未知晓的共和党候选人。
In polling carried out in March, some 47% of registered voters said they would like to re-elect Mr Obama, with just 37% saying they would vote for an as-yet-unknown Republican candidate.
示威者要求政府公开已登记的选民名单。
The demonstrators called on the government to publish a list of registered voters.
几乎不可能知道他们是否全部在相关投票站合法的登记；一些投票站显然没有公布已登记的选民名单。
It is impossible to know whether they had all been legally registered at the relevant polling stations; some polling stations apparently did not have the lists of registered voters on view.
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